中国电机工程学报2018，Vol.38Issue(4)：1255-1263,后插31,10.DOI:10.13334/j.0258-8013.pcsee.170042
低温等离子体处理对变频牵引电机 匝间绝缘性能影响
Influence of Nonthermal Plasma Treatment on the Insulation Property of Traction Motor
摘要
Abstract
Polyimide(PI) is used in the inter-turn insulation of traction motor for its excellent dielectric properties. In order to study the influence of nonthermal plasma treatment on the insulation property of PI, nonthermal plasma with a power density of 24.5 W/cm3 was gained by dielectric barrier discharge(DBD) in atmospheric pressure air. Single and double sides of PI films were modified, respectively. The contact angle, fourier infrared spectroscopy(FTIR) and corona breakdown time were used to detect the property changes. The results show that the contact angle of PI films decreases with the increase of plasma treatment time, but the surface energy is on the contrary.—NH2,—COOH,—OH and et al. hydrophilic groups introduced on the surface of the films are the main reasons for the surface property changes of PI. Besides, the corona resistance time of single layer PI thin films first increases and then decreases. When the treatment time is 10s, the corona resistance time of PI films is the biggest, and it is 17.7％ increase compared with the unmodified PI films. Meanwhile, the corona resistance time of the double sides modified films is improved by 30.3％ compared with the unmodified bilayer PI films. It is found that a certain degree of plasma treatment(less than 10s) can introduce polar groups on the surface of PI films, thus to enhance the surface charge diffusion ability and increase the difficulty of surface charge injection, which can improve the corona resistance property of single and bilayer films. In addition, the improvement of the corona resistance of the bilayer films is also related to the improvement of the interlayer interface.关键词
聚酰亚胺/匝间绝缘/介质阻挡放电/接触角/傅里叶红外光谱/耐电晕/层间界面Key words
polyimide(PI)/inter-turn insulation/dielectric barrier discharge (DBD)/contact angle/Fourier transform infrared spectroscopy (FTIR)/corona resistance/interlayer interface分类
信息技术与安全科学引用本文复制引用
张兴涛,吴广宁,杨雁,吴旭辉,雷毅鑫,钟鑫,朱健..低温等离子体处理对变频牵引电机 匝间绝缘性能影响[J].中国电机工程学报,2018,38(4):1255-1263,后插31,10.基金项目
国家杰出青年基金(51325704) （51325704）
工程电介质及其应用教育部重点实验室开放课题(哈尔滨理工大学)(KF20151109). Project Supported by National Science Fund for Distinguished Young Scholars(51325704) （哈尔滨理工大学）
Opening Foundation of Key Laboratory Engineering Dielectrics and Its Application (Harbin University of Science and Technology), Ministry of Education(KF20151109). （Harbin University of Science and Technology）
